Catherine Witt specializes in Temporary Traffic Patterns during construction operations, maintenance operations, utility operations, and special events. Any time the motorist traffic pattern is changed there are specific requirements. Ms. Witt and her team are familiar with the requirements on a national level, in all 50 states, the state specific requirements and job site specific based on contracts.
Experience: Ms. Witt and her team have a total over 100 years experience in the Traffic Safety Industry. She has trained over 20,000 construction, maintenance, utility and law enforcement workers in the requirements nation wide and started out doing installation over 25 years ago. Ms. Witt then worked for the City of Overland Park, KS doing design, plan review, special events and in house training.
Catherine Witt provides litigation consulting and expert witness services for legal cases involving fatalities, catastrophic injuries, personal injuries, and workplace safety. She has expertise in Work zone safety and OSHA regulations for construction, utilities, special events, emergency response and maintenance. Ms. Witt's expert witness services are available to attorneys for both Plaintiff and Defense.
Dr. Shakir Shatnawi, PhD, PE, is a nationally and internationally recognized expert in the Transportation Engineering industry. Shakir has a Ph.D. in Transportation Engineering. He has over 30 years of practical and extensive engineering and transportation expertise covering industry and public agencies including FHWA and the California Department of Transportation (Caltrans). Shakir is currently the president of Shatec Engineering Consultants. He taught highway engineering, traffic engineering and transportation engineering and pavement design at California State University. Dr. Shatnawi served as a principal investigator on multi-million dollar transportation projects. He held various positions at Caltrans including a Senior Transportation Engineer, a Supervising Transportation Engineer and a Division Chief. Dr. Shatnawi's education and experience demonstrates a wealth of engineering knowledge encompassing highway design, traffic engineering, pavement design, geotechnical engineering, materials and construction . As a recipient of many acknowledgements from the government, Dr. Shatnawi has an impeccable reputation within the industry for his significant professional contributions. As an expert orator, he frequently shares his knowledge at major conferences around the world. Dr. Shatnawi provides expert witness services in the following areas:
Scott L. Turner is a highly qualified Commercial Motor Vehicle (CMV) Transportation Expert, FMCSR Regulatory and PHMSA-HMR Expert with approximately 30-years experience in the highly specialized field of CMV crashes and incidents, and 16 years as the CEO of a nationwide CMV crash & HazMat disaster response corporation.
Mr. Turner's career includes personal response and/or investigation of over 1,000 CMV crashes, 200 cargo-tank truck crashes/incidents and a multitude of industrial setting incidents including fixed facilities, loading docks and loading rack disasters. His FMCSR and PHMSA knowledge (Federal Enforcement Training), detailed reporting and testimony can be a focal point of any civil litigation, where commercial motor vehicle crashes and/or transit incidents are at issue, with or without hazmat involvement. Mr. Turner is qualified in both the Federal Court system as well as multiple States throughout the United States and testifies on an approximate 50/50 average of Defense to Plaintiff ratio.
Areas of Expertise:
Level 1 FMCSA Inspections
Commercial Motor Vehicle (CMV) Post-Crash Inspection
Quality Forensic Engineering, LLC is a full-service forensic engineering firm, providing engineering support to clients in the areas of accident reconstruction, premises liability, and product liability. With over 20 years of experience for each of our senior engineers, we utilize the latest technology for documenting evidence and retrieving data including FARO 3D scanning, aerial drone imaging, and black box downloads. Our forensic engineers are mobile, supporting clients throughout the U.S. We are headquartered in Tallahassee, Florida with remote locations in Jacksonville, Florida and Tucson, Arizona.
Dr. Brian Pfeifer, P.E.,
With over 20 years of experience investigating and testifying in cases involving a variety of forensic engineering issues, Dr. Pfeifer is a leading expert in accident reconstruction, roadside safety, maintenance of traffic, and analysis of mechanical systems, and product failures. Dr. Pfeifer has a strong background in the design, development, and implementation of roadside safety hardware including guardrails, bridge rails, and crash cushions. Over 33 patents have been filed worldwide on behalf of Dr. Pfeifer and associated colleagues who invented safer guardrail systems and terminals, vehicle storage systems, shipping container handling systems, and material handling and storage methods.
Dr. Pfeifer has published numerous papers to various organizations including the Transportation Research Board and Port Technology International, covering topics ranging from new guardrail systems, energy-absorbing guardrail terminals, and breakaway mechanisms incorporated in traffic signs to material handling technology. Dr. Pfeifer’s expertise has been shared with many organizations such as the Florida Justice Association, Palm Beach County Justice Association, American Bar Association, Defense Research Institute, and Alabama Defense Lawyers Association with presentations he’s made on topics including vehicle collisions, bicycle accidents, roadway constructions zones, and accident reconstruction expert witness utilization.
Dr. Pfeifer is a registered Professional Engineer in three states and stays current with learning new technology in the field of forensic engineering. He has refined his skills and knowledge of accident reconstruction and roadside safety by taking dozens of continuing education courses over the span of his career.
Tractor / Trailer Collisions
Black Box Analysis
Product Failure Analysis
Maintenance of Traffic (MOT) evaluation
Restraint System Analysis
Ms. Traci Campbell, P.E., CXLT,
Ms. Campbell is an Industrial engineer with specialties in industrial accident reconstruction, including slip, trip, and fall analysis, human and environment interaction, forklifts, applicable standards and guidelines, and workplace-safety issues. Her expertise also includes vehicular accident reconstruction involving automobiles, trucks, tractor-trailers, and recreational vehicles, as well as, product failure analysis.
Slip / Trip / Fall
Retail Facility Safety
Human and Environment Interaction
ANSI / ASTM / Building Codes
Guarding & Warnings
Forklifts and Construction Equipment
Theme Parks / Recreation Safety and Facilities
Tractor / Trailer Collisions
Airbag and Black Box Analysis
Product Design / Failure Analysis
Mr. Chris Yates, P.E.,
Mr. Chris Yates, P.E., is a Mechanical Engineer with specialties in accident reconstruction, including electronic module downloads for both automobile airbag modules and tractor-trailer electronic control modules. His expertise includes auto accidents, tractor-trailer accidents, bicycle accidents, pedestrian accidents, and other roadway accidents. His expertise also includes seat belts, occupant kinematics, product failure analysis, and other general engineering issues.
Established in 2000, Laird are an Expert Witness services firm supporting the Legal sector across the UK. They understand the importance of providing an efficient and seamless customer journey and review their processes continually to ensure that they achieve and surpass expectation levels daily.
With constantly evolving IT systems and exceptional customer service, Laird are leading the way in the Expert Witness sector. You can instruct with the click of a button via their website and will be kept up to date at every stage of your case.
The experts at Miller Engineering are Ann Arbor-based professional engineers celebrating 30 years of service to University, Government, Insurance, and Industry through research, publications, presentations, and testimony. Miller Engineering has a staff of engineers and experts in the Mechanical, Chemical, Agriculture, Industrial, and Human Factors fields of engineering with specific knowledge in the following areas:
James M. Miller, PE, PhD – Founder Dr. Miller is an Emeritus Professor at the University of Michigan College of Engineering and a registered professional engineer and consultant with over 30 years of experience as an expert witness. He has served as a consultant to industry and government and is highly qualified to give engineering testimony.
Dr. Miller specializes in warnings, labeling and instruction manuals, consumer product design, machine guarding, process safety, fire science, vehicle visibility, tractor egress/ingress, pedestrian and worker slip and fall prevention, recreational vehicles (ATVs, boats, and personal watercraft), compliance with occupational safety and consumer safety standards (OSHA, MSDS, CPSC, ANSI, ASTM, UL, etc.).
Mark R. Lehto, PhD – Co-Founder Dr. Lehto is a Professor of Engineering at Purdue University. He completed his Ph.D. in engineering at the University of Michigan in 1985, where he specialized inHuman Factors Engineering, in particular Warnings and Labeling. He has taught courses at Purdue in human and safety factors areas, as well as decision making and artificial intelligence. He has authored numerous professionally-reviewed articles, and he has authored / coauthored internationally-recognized textbooks in the areas of human factors and ergonomics.
Dr. Lehto specializes in knowledge engineering, warnings and instructions, structuring expert systems, accident modeling, accident statistical analysis, consumer product safety, boating safety, in-field national surveys of product usage and product information effectiveness.
David R. Clark, PE, PhD – Co-Founder Dr. Clark is an Emeritus Engineering Professor at Kettering University. He was an engineering Ph.D. graduate from the University of Michigan, where he specialized in human factors engineering and system safety analyses. In particular, his earlier degrees in mechanical and electrical areas have given him a special expertise in electrical fire- and explosion-related accidents.
Dr. Clark is also published on the topics of warnings and labeling. With considerable in-plant experience at General Motors, he is uniquely qualified to provide student theses and design projects while teaching at Kettering that deal with many types of mechanical and optimization projects. Finally, he has extensive experience working for loss control companies, performing over 150 fire origin and cause investigations in the past few years.
Introduction to Human Factors and Ergonomics for Engineers, Second Edition presents and integrates important methods and tools used in the fields of Industrial Engineering, Human Factors and Ergonomics to design and improve jobs, tasks and products. It presents these topics with a practical, applied orientation suitable for engineering undergraduate students.
Emphasizing customer oriented design and operation, Introduction to Human Factors and Ergonomics for Engineers explores the behavioral, physical, and mathematical foundations of the discipline and how to apply them to improve the human, societal, and economic well being of systems and organizations.
The purpose of this research was to determine whether or not there is a measurable relationship between the use of expert witnesses in civil litigation and the profitability of American law firms. The subjects in the present study were 1,065 American law firms which responded to a confidential survey. . .
Commercial Trucking Transportation Expert Witness Donald Hess
Donald L. Hess, President of DLH Associates, Inc., has been providing expert witness services to attorneys and other clients, including Analysis of Vehicle Crashes since 1997. His specialty is crashes involving Commercial Motor Vehicles, including trucks, tractor-trailers, and buses.
With well over two million miles of safe cross-country trucking experience, followed by over 20 years as a driver trainer and creator / administrator of commercial driving programs, Mr. Hess is well-qualified to provide analysis of what drivers are trained to do in specific situations and circumstances, what federal and state regulations call for and require, and all aspects of the safe and proper operation of commercial motor vehicles. As a motorcyclist with over 45 years of riding and training experience, he is also qualified to comment on accidents involving motorcycles.
Mr. Hess has been nationally-recognized as a leader in safety and training issues, is a winner of the American Trucking Associations Million Mile Driving award, and was a winner of the Truckload Carriers Association Lee Crittenden award. Over his long and successful career in trucking and education, he has held numerous national board and officer positions in trucking and education.
Litigation Support - Mr. Hess is uniquely qualified to analyze and comment on driver behavior in virtually any situation, and has established a solid reputation as an expert witness in crashes involving trucks and commercial vehicles for both Plaintiff and Defense in about 300 hundred cases across the country since 1997. His experience includes significant deposition and trial testimony.
He possesses a unique combination of training, hands-on experience, and education that combine to position him as a leading expert in all facets of trucking. Mr. Hess still maintains a valid, current Commercial Driver License fully endorsed for Combination Vehicles, Doubles-Triples, Tankers, Hazardous Materials, Motorcycles, and Buses. He also holds a USDOT Medical Exam Certificate and CDL and medical maintained without interruption or fault since 1971.
Dean Tekell Consulting provides expertise in the areas of Traffic Engineering, Parking, Public Transit, Vehicle Dynamics, Accident Reconstruction, and Technical Accident Investigation.
Often, government agencies, consulting engineers, architects, developers, business institutions, and attorneys must know how to move people and their goods safely and efficiently. The firm offers advice on site selection, traffic access, and traffic circulation on the site. The firm provides insight into potential problems with zoning and subdivision regulations. Traffic impact studies, traffic signal warrant analysis, traffic signal design and permitting services related to development activity are also available through the firm. Parking garage and parking lot operations are specialties offered to business institutions.
Other services include: Queuing Studies for drive-through services; Traffic Calming and neighborhood speed control; School trip and pedestrian safety plans; Traffic Accident Reduction and highway safety techniques; Transit Funding Operation; Intelligent Vehicle-Highway Systems.
Dr. Jeffrey Buckholz is a practicing design engineer with over 40 years of experience in Traffic Engineering, Traffic Signal Timing, Signal Design and Signal Construction. He is also proficient in Pavement Marking Design, Roadway Signing, and Work Zone Traffic Control. Dr. Buckholz has authored 3 national training manuals in signal design, construction and inspection. He is a PE in 6 states: FL, GA, CA, MA, MI, OH and is a Professional Traffic Operations Engineer. Dr. Buckholz has been chief engineer of his engineering company for 30 years and was an Adjunct Professor at the University of North Florida from 2005 through 2007. He has served as an expert witness in over 220 cases. Past Project Experience:
Traffic Signal and ITS Design
Traffic Signal Timing
Signing and Pavement Marking Design
Work Zone Traffic Control Design
Transportation Traffic Engineering Expert Witness Carl Berkowitz
Carl Berkowitz, PE, Ph.D., AICP, is a Transportation and Traffic Engineering expert with almost 50 years of expertise. He's held various managerial and administrative positions in the transportation industry, government, private, and academic sectors.
Dr. Berkowitz has extensive multi-modal experience in planning, design, engineering, safety, security, construction, maintenance, operations, and management. He has written and edited numerous reports, studies, articles, and columns for major publications, journals, newspapers and scholarly periodicals.
Transportation and Traffic Engineering Consultant, 1988 - Present
New York City Department of Transportation, New York, 1970 – 88
New York State Office of Planning Coordination, New York, 1967 - 70
New York State Department of Transportation, Babylon, NY, 1963 - 67
New York City Transit Authority, New York, 1962 - 63
Litigation Support - Dr. Berkowitz has served as a litigation consultant since 1997. He has the background and experience to make him ideally suited to contribute important information at every stage in the litigation process. Dr. Berkowitz is able to explain complex issues in layman terms, suggest strategies, investigate and uncover facts, perform literature reviews, research, and prepare safety evaluations. He has been deposed / testified over 50 times in the last 5 years.
Richard F. Beaubien, PE, PTOE is a Professional Traffic Operations Engineer and Managing Director at Beaubien Engineering. He was previously Transportation Department Head at Hubbell, Roth & Clark, Consulting Engineers for more than 23 years. Mr. Beaubien's employment experience includes 5 years as a highway engineer with the Federal Highway Administration and 14 years as the traffic engineer for the City of Troy, Michigan. Mr. Beaubien is a past International President of the Institute of Transportation Engineers and the past President of the Intelligent Transportation Society of Michigan. He currently chairs the Metro Detroit Traffic Incident Management Coordinating Committee. Richard Beaubien is a registered professional engineer in several jurisdictions.He has been certtified by the Transportation Professional Certification Board as a Professional Traffic Operarations Engineer and a Road Safety Professional. His litigation support services are available to attorneys for both Plaintiff and Defense. He has testified in court several times. Specialty Areas:
A motorist exiting a rural freeway was struck by a motorist on the intersecting State Route at the top of the exit ramp. At the westbound exit ramp from the Interstate freeway the State Route a stop sign is posted at the end of the ramp requiring exiting traffic to stop before entering the State Route. However, the eastbound off ramp traffic is not required to stop before entering the State Route. A stop sign is posted on southbound State Route at the ramp terminal. This is an unusual traffic signing pattern for interstate off ramps. Expert observations of the operation of this intersection showed that a large proportion of the eastbound off ramp traffic slowed down at the end of the ramp, expecting to stop at the State Route.
As traffic engineers we take care to plan, design, and operate our roads for all users. When we are working in a complex urban environment, we must consider pedestrians, wheelchairs, vision impaired, bicycles, buses, and trucks. When we add automated, connected, and self-driving vehicles to the mix the complexity becomes more complex. That is why the profession is challenging and interesting.
When I was a boy, playing in the sandbox or building with blocks, I dreamed of building cities. I feel fortunate to be in a profession which allows me to fulfill that dream. To enjoy your job is a more important measure of success than the amount of money in your bank account. My favorite definition of success is borrowed from Ann Landers:
At the 1981 ITE Annual Meeting in Boston a seminar was convened on the role of the urban traffic engineer. It featured some of outstanding veterans of the profession, and each offered their insights on the role of the urban traffic engineer. Speakers included Bill VanGelder from Seattle, Harold Michael from Purdue, and Bill Mc Grath who was once the Traffic Commissioner for the City of Boston.
The topic of Connected Vehicles and Autonomous Vehicles is not new, yet advances in computing power, wireless capabilities, and soft ware development are taking implementation predictions from the not-too-distance future and placing them in the here and now. Emerging vehicle technologies foreshadow a world in which sensors and soft ware will replace humans in the driver's seat.
Ralph Aronberg, P.E., has reconstructed over 1,500 accidents and has testified in over 150 jury trials, since founding the firm in 1983. He provides Expert Witness services in the areas of:
Traffic accident reconstruction (cars, trucks, motorcycles and pedestrians).
Vehicle occupant kinematics (seatbelts)
Traffic engineering design (geometrics, signing, markings, signals and lighting)
Sight distance analysis
Hazardous roadway conditions
Work Zone Traffic Control evaluation
Evaluation of roadway curvature
Traffic signal operations
Computerized accident reconstruction and simulation
Vehicle "black box" data retrieval (certified>
Mr. Aronberg is published in the fields of pedestrian / bicycle / motorcycle accident reconstructions, and 3 Dimensional Animations and Scientific Visualizations through the Society of Automotive Engineers. Mr. Aronberg is a Fellow member of the National Academy of Forensic Engineers, and certified as a Diplomat in forensic Engineering.
Dr. Tarek Omar, is a Mechanical and Structural Engineering expert with over 24 years of leading edge experience in the areas of accident investigation and reconstruction, highway safety, automotive / vehicular engineering, security barriers and structural analysis. From 1994 to 2002,
Dr. Omar worked as a Senior Research Scientist at the National Crash Analysis Center (NCAC), the renowned research center created in 1992 as a successful collaborative effort among the Federal Highway Administration (FHWA), the National Highway Traffic Safety Administration (NHTSA), and George Washington University (GWU). The NCAC supports the US-DOT strategic goal to reduce fatalities and injuries on the nation's roadways and has successfully served to enhance safety worldwide. Dr, Omar completed numerous research projects in vehicle crash analysis, vehicle crashworthiness, and highway safety.
In 2002, Dr. Omar founded his consulting firm, Advanced Research and Technology Corp (ART). In his role as President and Senior Consultant, he directs and conducts advanced Design and Nonlinear Finite Element Analysis (FEA) in the areas of Structural Impacts, Transportation Safety, and Physical Security Protection.
Litigation Support - Dr. Omar and his team at ART provide clients with the compelling scientific evidences necessary to pursue and win complex specialty lawsuits including but not limited to vehicle crash, airbag and seatbelt fatalities and injuries, slip, trip & falls, occupant biomechanics, crashworthiness, and failure analysis, fuel tank, pipelines, and pressure vessel analysis.
ART experts are widely recognized as a world leader in advanced computer simulations of complicated structural dynamics, crash, and impact-related problems. They use state-of-the-art technology including 3-D computer animation engineering and modeling and the latest engineering techniques for crash analysis (frontal, side-impact, vehicle, rollover, etc.), crash scene investigation, crash test data analysis (FMVSS, NCAP, IIHS, etc.), crash statistical data analysis (NASS, FARS, etc.), occupant kinematics, occupant protection, biomechanics, vehicle dynamics, and computerized crash simulations.
Peter J. Sullivan is a World Class Certified ASE Technician and ASE Certified Master Technician in Heavy Duty Truck, Passenger Car / Light Truck, Collision Repair, and Machinist, (National Institute for Automotive Service Excellence). He has over 35 years of technical, academic, operational, and managerial experience in the private and commercial transportation, heavy equipment, marine, and recreational vehicle industries.
Mr. Sullivan has extensive experience performing vehicle inspections and downloads of event data recorders and electronically stored information (ESI), including analysis, validation, testing, and preservation on almost all makes and models of vehicles and equipment.
Litigation Support - Mr. Sullivan utilizes his comprehensive legal, technical, and FMCSA / DOT knowledge to specialize in:
Product Defect Cases
Driver or Motor Carrier Compliance
Electronic Engine Control (ECM)
Electronic Throttle Control
Electronic Power Steering
He and his team perform accident site and vehicle inspections, perform data downloads, including analysis, on most all makes and models of vehicles and equipment, reconstruct accidents, perform exemplar and product testing, metallurgical testing, fluid analysis, and CMV driver and motor carrier compliance analysis. His primary areas of expertise include medium duty / heavy duty truck, hy-rail, light duty car / truck, motorcycle, ATV, marine, heavy equipment, machinery, tire, bicycle, commercial motor carrier safety and DOT compliance, and commercial motor vehicle driver / operator qualification and compliance, and job site safety.
Mr. Sullivan's services are available to counsel representing both Plaintiff and Defense. His litigation support services also include expert reports, depositions, and testimony for trial, OSHA, and governmental hearings.